Improvement in the method of constructing a combined caldron, steam-boiler, and furnace



L. E. HOPKINS.

Agricultural Boiier.

Patented Oct. 11, 1841,.

I N. PETERS, Fhotv-Lllh g nhen Wuhingtum n c.

LANSING E. HOPKINS, OF NIHV YORK, N. Y.

IMPROVEMENT IN THE METHOD OF CONSTRUCTING A COMBINED CALDRON,STEAM-BOILER, AND FURNACE.

Specification forming part of Letters Patent No. 2,306, dated October11, 184.1.

To all whom it may concern:

Be it known that I, LANSING E. HOPKINS, of the city of New York, in theState of New York, have invented a new and useful Combined Steam-Boilerand Oaldron, which apparatus is intended principally for the use offarmers and graziers in preparing food for cattle, but which may beadvantageously used also for other purposes in domestic economy andmanufactures; and I do hereby declare that the following is a full andexact description thereof.

In the accompanying drawings, Figure 1 is a perspective view of theboiler and caldron, and Fig. 2 a vertical section thereof through itsmiddle.

A is a cap-piece or rim, which may consist of a plate of cast-iron.

B is the caldron, which may be cast in one piece with the cap-piece orrim A.

Thebody O of the boiler is best made of sheet-iron, and this isfurnished with a flange, to which the cap-piece is united by rivets orscrews, as at a a. The bottom plate also may be of cast or ofwronghtiron and be united to the body in a similar way.

The furnace or fire-chamber D, I make in the form of a dome, as shown inthe drawings, this form admitting more freely of expansion andcontraction and sustaining the pressure of the steam more securely thanany other. The bottom part of the fire-chamber is composed of horizontalgrate-bars, having an ashpit G beneath them in the usual way. Isometimes,more especially when coal is to be used as fuel, employvertical grate-bars, as shown at F, and these may be extended around thewhole interior of the fire-chamber. The space N within the body 0 andsurrounding the firechamber is to be filled with water to a properheight, and constitutes the steam-boiler. It is furnished with tri-cocksb b b, and with holes and stoppers J to admit of cleaning out theinterior of the boiler.

The smoke-pipe E,Fig. 2, is carried through the space N and is seenemerging at Min Fig. 1.

K is a safety-valve constructed in the usual way.

L is a steam-tube from which the steam may be conducted wherever it maybe required for the purpose of steaming, heating, or cooking articles inreceivers orcases of wood or metal.

H, Fig. 3, is a lid or cover for the caldron, made in the ordinary form.

I, Fig. 3, is a raised or dome-formed cover, which may be used tocontain articles to be steamed over the caldron.

In an apparatus of the form and construction above described steam ofhigh pressure may safely be generated, so as to render it efficient fora great variety of purposes, and if a steam-tigl'it cover is substitutedfor the covers H or I of the'caldron said caldron will be converted intoa digester, as the liquid contained in it maybe elevated above that ofthe ordinary boiling-point. This apparatus will be specially useful forvarious purposes in domestic economy, such as the trying out tallow andlard, making soap, evaporating maple-j nice or other fluids, and it mayalso be applied to manufactures of various kinds. It may be made ofvarious sizes, according to the wants of those who use it.

Having thus fully described the nature of my combined steam-boiler andcaldron and shown the manner in which the same is to be constructed,what I claim therein as new, and desire to secure by Letters Patent, is-

The particular manner herein set forth of arranging and combining thefurnace, the steam boiler or generator, and the caldron, the generalform and arrangement of these parts being substantially the same withthose described, without, however, intending by the accompanyingdescription and representation to limit myself to any precise shape orproportions of the respective parts, but to vary these as I may findconvenient.

LANSING E. HOPKINS. Witnesses:

WILLM. BALLARD, Tnos. J. SOMMERS.

